Workshop Technology
A progressive limit gauge has

'Go' and 'Not go' member on the same side of the gauge
None of the listed here
Separate 'Go' and 'Not go' members
'Go' member at one end and 'Not go' member at the other end

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Workshop Technology
Piercing is an operation of cutting

A flat sheet to the desired shape
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A cylindrical hole in a sheet of metal by the punch and the die
A number of holes evenly spaced in a regular pattern on a sheet of metal

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